It may be that I was young when I did it (13). Fortunately, I had a male friend who taught me. Unfortunately, that male friend was going out with my best female friend at the time! But you know, that's besides the point!
What I mean by the basics, is I didn't know how to hold it, or that the skin 'moved' along the shaft. I didn't know how fast to go or how slow to go, how strong to grip it, or not to grip it too strong!
I did acknowledge the link you put up, and yes, it does say to pull the skin on the shaft at the beginning...but lets say, that's not enough for a first timer. Maybe now that there is diagrams, it will help.
I'll be happy to answer any other questions!
